/**
  ******************************************************************************
  * @file    GPIO/GPIO_IOToggle/stm32f4xx_it.c 
  * @author  MCD Application Team
  * @version V1.4.0
  * @date    04-August-2014
  * @brief   Main Interrupt Service Routines.
  *          This file provides template for all exceptions handler and 
  *          peripherals interrupt service routine.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT 2013 STMicroelectronics</center></h2>
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing, software 
  * distributed under the License is distributed on an "AS IS" BASIS, 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_it.h"

/** @addtogroup STM32F4xx_StdPeriph_Examples
  * @{
  */

/** @addtogroup GPIO_IOToggle
  * @{
  */

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

/******************************************************************************/
/*            Cortex-M4 Processor Exceptions Handlers                         */
/******************************************************************************/

/**
  * @brief   This function handles NMI exception.
  * @param  None
  * @retval None
  */
void NMI_Handler(void)
{
}

/**
  * @brief  This function handles Hard Fault exception.
  * @param  None
  * @retval None
  */
void HardFault_Handler(void)
{
  /* Go to infinite loop when Hard Fault exception occurs */
  while (1)
  {
  }
}

/**
  * @brief  This function handles Memory Manage exception.
  * @param  None
  * @retval None
  */
void MemManage_Handler(void)
{
  /* Go to infinite loop when Memory Manage exception occurs */
  while (1)
  {
  }
}

/**
  * @brief  This function handles Bus Fault exception.
  * @param  None
  * @retval None
  */
void BusFault_Handler(void)
{
  /* Go to infinite loop when Bus Fault exception occurs */
  while (1)
  {
  }
}

/**
  * @brief  This function handles Usage Fault exception.
  * @param  None
  * @retval None
  */
void UsageFault_Handler(void)
{
  /* Go to infinite loop when Usage Fault exception occurs */
  while (1)
  {
  }
}

/**
  * @brief  This function handles SVCall exception.
  * @param  None
  * @retval None
  */
//void SVC_Handler(void)
//{
//}

/**
  * @brief  This function handles Debug Monitor exception.
  * @param  None
  * @retval None
  */
void DebugMon_Handler(void)
{
}

/**
  * @brief  This function handles PendSVC exception.
  * @param  None
  * @retval None
  */
//void PendSV_Handler(void)
//{
//}

/**
  * @brief  This function handles SysTick Handler.
  * @param  None
  * @retval None
  */
//void SysTick_Handler(void)
//{
//}

/******************************************************************************/
/*                 STM32F4xx Peripherals Interrupt Handlers                   */
/*  Add here the Interrupt Handler for the used peripheral(s) (PPP), for the  */
/*  available peripheral interrupt handler's name please refer to the startup */
/*  file (startup_stm32f40xx.s/startup_stm32f427x.s/startup_stm32f429x.s).    */
/******************************************************************************/

/**
  * @brief  This function handles PPP interrupt request.
  * @param  None
  * @retval None
  */
/*void PPP_IRQHandler(void)
{
}*/
extern uint8_t key_flg1;
extern uint8_t key_flg2;
extern uint8_t key_flg3;
extern uint8_t key_flg4;



void EXTI9_5_IRQHandler(void)
{
	
    if(EXTI_GetITStatus(EXTI_Line9) != RESET)
    {
        EXTI_ClearITPendingBit(EXTI_Line9);
        if(GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_9) == 0)
        {
            key_flg2 = ~key_flg2; 
        }
    }

    if(EXTI_GetITStatus(EXTI_Line8) != RESET)
    {
        EXTI_ClearITPendingBit(EXTI_Line8);
        if(GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_8) == 0)
        {
            key_flg3 = ~key_flg3;
        }
    }

    if(EXTI_GetITStatus(EXTI_Line5) != RESET)
    {
        EXTI_ClearITPendingBit(EXTI_Line5);
        if(GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_5) == 0)
        {
            key_flg4 = ~key_flg4; 
        }
    }
}

void USART6_IRQHandler(void)
{
	uint8_t data;
	if(USART_GetITStatus(USART6,USART_IT_RXNE) == SET)
	{
		data = USART_ReceiveData(USART6);
		if(data == 'A')
		{
			key_flg1 = ~key_flg1;
		}
		else if(data == 'B')
		{
			key_flg2 = ~key_flg2;
		}
		else if(data == 'C')//
		{
			key_flg3 = ~key_flg3;
		}
		else if(data == 'D')//流水灯
		{
			key_flg4 = ~key_flg4;
		}
		USART_SendData(USART6, data);
		//清除中断标志
		USART_ClearITPendingBit(USART6, USART_IT_RXNE);
	}

//	if(USART_GetITStatus(USART6,USART_IT_TC) == SET)
//	{
//		//清除中断标志
//		USART_ClearITPendingBit(USART6, USART_IT_TC);
//	}
}

/**************************************
函数名：TIM6_DAC_IRQHandler
函数功能：定时器6中断处理函数
输入参数：无
输出参数：无
其它：在中断中取反蜂鸣器
****************************************/
void TIM6_DAC_IRQHandler(void)
{
	if(TIM_GetITStatus(TIM6, TIM_IT_Update))//判断是否为定时器6的更新中断
	{
		TIM_ClearITPendingBit(TIM6, TIM_IT_Update);//清除中断标志
		//GPIOA->ODR |= (0X01<<15);
		if(key_flg1) 
		{
        	GPIO_ToggleBits(GPIOA, GPIO_Pin_15); // 标志位为1时，定时翻转蜂鸣器
        } 
		else 
        {
            GPIO_ResetBits(GPIOA, GPIO_Pin_15); // 标志位为0时，强制关闭蜂鸣器
        }

	}

}

/**
  * @}
  */ 

/**
  * @}
  */ 


/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
